Kate is writing a program that processes text. She is given a number of strings, which she processes one by one: makes all characters lowercase, deletes punctuation and so on. While she does the processing, Kate wants to store all these processed strings in a collection object. Which type of collection should she use: mutable or immutable?
Note that Kate doesn't know how many strings she will be given in advance. She may also want to edit the collection afterward: delete identical strings or further process particular strings.
In the answer field below, write which type of collection suits Kate's task better: mutable or immutable.